Add initial support for NV_path_rendering extension to gpu command buffer

gpu/command_buffer/tests/gl_chromium_nv_path_rendering_unittest.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <GLES2/gl2extchromium.h>
+
+#include "gpu/command_buffer/tests/gl_manager.h"
+#include "gpu/command_buffer/tests/gl_test_utils.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace gpu {
+
+class CHROMIUMNVPathRenderingTest : public testing::Test {

[piman, 2014/04/11 22:19:27]

nit: s/CHROMIUMNV/CHROMIUM/

[Kimmo Kinnunen, 2014/04/15 16:16:58]

Done.

+public:
+  static const GLsizei kResolution = 100;
+
+protected:
+  virtual void SetUp() {
+    GLManager::Options options;
+    options.size = gfx::Size(kResolution, kResolution);
+    gl_.Initialize(options);
+  }
+
+  virtual void TearDown() {
+    gl_.Destroy();
+  }
+
+  GLManager gl_;
+};
+
+TEST_F(CHROMIUMNVPathRenderingTest, TestMatrix) {
+  if (!GLTestHelper::HasExtension("GL_CHROMIUM_NV_path_rendering")) {
+    return;
+  }
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+
+  GLfloat matrix[16] = {
+    10.0f,  0.0f,  0.0f, 1.0f,
+    0.0f, 10.0f,  0.0f, 1.0f,
+    0.0f,  0.0f, 10.0f, 1.0f,
+    0.0f,  0.0f,  0.0f, 1.0
+  };
+  glLoadMatrixf(matrix);
+  glMatrixMode(GL_PROJECTION);
+  glLoadMatrixf(matrix);
+  EXPECT_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());

[vmiura, 2014/04/11 21:54:48]

Can we add a test of reading back the matrices?

[Kimmo Kinnunen, 2014/04/14 12:56:30]

In theory it can be added. That entry point would never be used by the client
code. Do we want such dead code?

[vmiura, 2014/04/14 19:08:29]

I guess we have GL_MATRIX_MODE, but not
GL_MODELVIEW_MATRIX/GL_PROJECTION_MATRIX.

I would suggest adding them so this can be tested in isolation of running a
complete NV path test.

[Kimmo Kinnunen, 2014/04/15 16:16:58]

Done.

+}
+
+}  // namespace gpu